A few notes combined in one post to minimize topic bump ups. Log in to see images in this post.
Apps - of the 6+ different apps (apps, not versions of apps) available to use with the battery packs, my preference is the Carplounge app. #1. It comes from Google Play & #2. Pack voltage display resolution is to 10mV on the Dashboard. I really need to see that extra digit to understand where the pack is at relative to reported SOC. Cell voltages are shown to 1mV but not easy to sum on the fly.
JBD released a new version of their app on jiabaida.com. It's xiaoxiang 3.1.1026.27.apk - works's as expected on my phones. It looks very much like version 3.1.1021.25. Probably some improvements.
Viewing pack info - There's the PC app through USB & Bluetooth for Android & iPhones and also a small LCD display
option. I've ordered the LCD to try. I don't know if it's needed or not but at around USD$23 I didn't think too much about getting it. I could have these batteries for 10 or possibly 15 years and the display might be ideal for some future use.
Display will be in English. Pack voltage might be only shown to tenths of a volt. I was asked how many cells in series when I ordered it from ShawnBest Store on AliExpress - https://www.aliexpress.com/item/1005001441224519.html
There's more info about it on IC GOGOGO also - https://www.aliexpress.com/item/32878566013.html
JBD BMS LCD.jpg
SOC accumulated error fix - Really small currents, measuring accuracy errors, calibration errors, repeated partial state of charge cycling can all effect the accuracy of the reported coulomb counted SOC. With lead acid batteries there's a requirement to fully charge the battery for performance and longevity. Fully charging the battery resets the SOC measuring device so errors don't accumulate. There's no requirement to fully charge lithium batteries often so the errors can accumulate. JBD BMS let you set 20%, 40%, 60%, 80% & Full voltage set-points. Full is when the reset to 100% SOC occurs. If the error accumulation has grown to where it's noticeable then resetting the pack's capacity is a quick way to force a SOC reset to be within the voltage check points you entered. Access to Reset Capacity
feature is through Function Setting
in the main menu. If you are cycling the battery and recharging to full frequently then SOC errors won't be noticeable.
Bluetooth - BT range was not as good as I'd expected so a took a chance and ordered new Bluetooth modules from JBD on AliExpress - https://www.aliexpress.com/store/1379203
. The original BT modules were the color blue with no visible brand and the new modules are green and branded JBD. What a big difference! Range is substantially increased. I have an old Samsung phone that I hoped to use with the packs. It never
worked. It would lock the modules in a busy state and require physically unplugging the modules to recover. I tried every app with that phone and none worked
. The new BT modules solved that problem too!
All of my phones, new and old, work as expected now.
BT signal strength 1.jpg
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BT signal strength 2.jpg
I added JBD to the new BT module names for easy identification. The original module has BMS in the name. You can easily see the difference in signal strength from different areas of my house with all three packs in the same location.
The Packs proved their usefulness during a recent 30 hour grid power outage. I used them to power a kettle & coffee maker in the early AM. I ran a generator during the day and used the Packs to power one fridge and two freezers overnight.